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FDP Forum / The 'Pup' Tent / Low "E" magnet dead/dying

super mario
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USA

I am on a quest...just not sure where!
Aug 20th, 2017 07:08 PM   Edit   Profile   Print Topic   Search Topic

I need to see if I am heading in the right direction here. My current Stratocaster project involves using 2 SD SSL-1's in the neck/middle with a SD SSL-5 (non-coil tap) in the bridge. I had these in my #1 Strat before updating it with Texas Specials about 5 years ago. These have been in the box until now. I did not think about them having magnet issues until now. The SSL-1's are fine but not the SSL-5 as the lowE appears to be dead/dying. By that I mean the magnet seems to have lost its pull and as such when I hit the lowE there is little to no sound. The other five strings sound fine. So I have been reading up on how to remagnetize a pickup and wondering if that is all I need to do.

StewMac has super strong neodymium magnets for sale so I have started looking there. Any thoughts on the best way to do this....

FYI - I am not looking to replace the SSL-5 with another pickup as I like its tone...just want to hear what are the best ways to remagnetize this pickup....

Peegoo
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Aug 24th, 2017 07:47 PM   Edit   Profile   Print Topic   Search Topic

You have to set up the charging magnets so you can pass the pickup between them, without the pickup pole pieces making contact with the charging mags.

Do like the guy in the vid below, but tape some thin plastic (e.g., strips cut from a blister pack) to the top and bottom of your pickup to prevent the metal from making contact with the charging mags. You'll get a better charge that way.

His technique is 70% there.

Achase4u

U.S. - Virginia

Aug 24th, 2017 09:54 PM   Edit   Profile   Print Topic   Search Topic

All you need to do is leave the neo mags in their individual plastic snap top containers from stew mac and that will keep your mags from contacting.

This depends on if they still sell them that way.

Probably just needs a charge but once in a blue moon there will be a mag that just won't hold a charge. Thats very rare though.

super mario
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USA

I am on a quest...just not sure where!
Aug 25th, 2017 06:48 AM   Edit   Profile   Print Topic   Search Topic

Thanks for the feedback. I had seen where it is imperative that you don't touch pickup polepieces to the magnets. Wound up getting a couple of N52 Neo magnets off Amazon. I will stick them to the min-vise on my bench and pass the pickup between them. Good ideas to use blister plastic as a barrier. Hopefully it will only be a simple recharge....

Hammond101
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So. Cal. USA

Aug 25th, 2017 02:29 PM   Edit   Profile   Print Topic   Search Topic

Be care not to get you fingers between the neo mags if/when they are attempting to attract each other. I've seen folks bit, actually cut by the force of good neo magnets when they are attempting to connect.

I've had some experience with them swapping magnets on lap steel pickups. Use caution please.

super mario
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USA

I am on a quest...just not sure where!
Aug 25th, 2017 04:23 PM   Edit   Profile   Print Topic   Search Topic

Hammond - I've already had to wrestle them apart to get them on the vise I will use to set the gap. They sure are strong! Now to get the pickup ready to demagnetized.

super mario
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USA

I am on a quest...just not sure where!
Aug 25th, 2017 05:34 PM   Edit   Profile   Print Topic   Search Topic

Peegoo - good to see that dude's video referenced, as I had already watched it. Will make sure to do the blister plastic thing to keep the pickup from.making contact....Once again the FDP crew comes to the rescue!

Achase4u

U.S. - Virginia

Aug 25th, 2017 08:25 PM   Edit   Profile   Print Topic   Search Topic

Take care not to damage their finish as well. They are plated for a reason. Neos can explode.

Peegoo
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Sep 1st, 2017 09:43 AM   Edit   Profile   Print Topic   Search Topic

"I've already had to wrestle them apart"

Always slide neo and samarium cobalt mags off of each other, rather than pry them apart. Like Aaron mentions above, they are quite fragile and can shatter. The shards are often like little razor blades. It's happened to me.

And store them far away from mag-sensitive items such as guitar pickups, speakers, computers, CRTs, electric motors, etc. Some of these small mags have intense magnetic fields. Set one atop a laptop and it can permanently scrmabel the hard drive.

super mario
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USA

I am on a quest...just not sure where!
Sep 1st, 2017 11:50 AM   Edit   Profile   Print Topic   Search Topic

Peegoo - I've had the broken magnet syndrome...while sliding apart one flew off and broke into several pieces. Still have not gotten the weak magnet to restrengthen like it should. Going to give it another whirl over the weekend when I have a few extra moments.

Peegoo
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Sep 1st, 2017 03:15 PM   Edit   Profile   Print Topic   Search Topic

It may be a gonner. Like Aaron said, they sometimes won't hold a charge.

You can replace the polepiece.

One of the reasons it's good to keep dead pickups (that you're not going to rewind right away) in the parts bin.

super mario
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USA

I am on a quest...just not sure where!
Sep 1st, 2017 07:47 PM   Edit   Profile   Print Topic   Search Topic

Starting to think it may be a lost cause as well. I have never really swapped magnets but thinking it would be a matter of sliding the old one out with a "good" one. Does Seymour Duncan use sleeves around the magnets?

Achase4u

U.S. - Virginia

Sep 1st, 2017 09:50 PM   Edit   Profile   Print Topic   Search Topic

Hmmm I think those models are wound right around the magnets. The fact that it is an outer magnet is more worrisome. That's the point of highest tension for the coil wire so its really hard against that magnet.

So if you push the magnet out, the relief of the missing magnet will cause the coil to relax and possible come inward and in the way of the flatwork hole.

So when you push a new magnet in you will actually be pushing against coil wire and likely scrape or snap a piece and short it out. However.... if the coil is potted SOLID with wax or some sort of hard substance, then the coil will likely stay in shape and not be an issue. You will need to measure the outside diameter of the magnet and make sure the new one is no larger.

Try pushing out the old magnet just a little, and simultaneously start the new magnet and push the old out with the new. If your downward pressure goes off axis, there is a point in which one end of the magnet inside the pickup can wander around and possible strike coil wire.

I'm making it out to be a little more difficult than it is only so that with these things in mind you will take the care necessary to do this without causing any collateral damage. You could always send it back to Seymour and tell him you tried charging it to no avail.

***Be aware that every foundry has a slightly different sounding alnico 2, 3, 5 etc due to where they get their ores and their methodology etc. They are all mostly shooting for MMPA standards but I can tell you without a doubt they are all a little different. So it might behoove you to get Seymour to replace the mag with the same stock to avoid any differences in response between the new low E pole and the rest.***

Either way, good luck to you.

Peegoo
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Sep 2nd, 2017 09:42 AM   Edit   Profile   Print Topic   Search Topic

Great point. If they're wound on the poles (a la Leo Fender's original recipe), that will kill the pickup.

Sometimes simply shifting a magnet's height in the bobbin can kill the pickup.

Seymour's customer service is second to none. I would not be surprised if they repair the pickup at no cost to you.

super mario
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USA

I am on a quest...just not sure where!
Sep 2nd, 2017 10:48 AM   Edit   Profile   Print Topic   Search Topic

Gonna get up with them to see what they say/offer. Thinking that is the best route...thanks guys for helping me navigate this.

super mario
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USA

I am on a quest...just not sure where!
Sep 6th, 2017 10:54 AM   Edit   Profile   Print Topic   Search Topic

Peegoo - its shipping to the Custom Shop today. The standard rate is $10 to remagnetize. Will have to wait and see what they say once it is there.

super mario
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USA

I am on a quest...just not sure where!
Sep 27th, 2017 09:44 AM   Edit   Profile   Print Topic   Search Topic

Well she's back! Arrived in the mail Monday, soldered back in this morning! Wow the folks at Seymour Duncan did it right. Not so sure they did not rewind it as the pickup box said it now measures just 13.1k when it used to be 13.6. Anyway it sounds great and there is no more dead/dying low"E". Hats off to great service from the folks at Seymour Duncan and thanks Peegoo for suggesting that route!

Hammond101
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So. Cal. USA

Sep 27th, 2017 09:54 AM   Edit   Profile   Print Topic   Search Topic

Very cool! I've had great experiences with SD. They make the only bass PUs I will use.

Mick Reid
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Australia

American-made in Oz!!
Sep 27th, 2017 08:32 PM   Edit   Profile   Print Topic   Search Topic

Good result mario!

FWIW, .5k difference is not much.
Ohm readings will vary under different circumstances. Particularly temperature.
A specified DCR from a manufacturer should be at an ambient temperature of 20° C.


stratcowboy
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USA/Taos, NM

Sep 28th, 2017 07:58 AM   Edit   Profile   Print Topic   Search Topic

FWIW...20 degrees C = 68 degrees F.

FDP Forum / The 'Pup' Tent / Low "E" magnet dead/dying




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